UV_{185+254 nm} photolysis of typical thiol collectors: decomposition efficiency, mineralization and formation of sulfur byproducts.

ABSTRACT: The decomposition of toxic flotation reagents upon UV_{185+254 nm} irradiation was attractive due to operational simplicity and no dosage of oxidants. In this work, the degradation of typical thiol collectors (potassium ethyl xanthate (PEX), sodium diethyl dithiocarbamate (SDD), O-isopropyl-N-ethyl thionocarbamate (IET) and dianilino dithiophoshoric acid (DDA)) was investigated by UV_{185+254 nm} photolysis. The degradation efficiencies and mineralization extents of collectors were assessed. The formation of CS₂ and H₂S byproducts was studied, and the mechanisms of collector degradation were proposed under UV_{185+254 nm} irradiation. The PEX, SDD and IET were decomposed with nearly 100% removal upon 75 min of UV_{185+254 nm}

SUBMITTER: Fu P 

PROVIDER: S-EPMC6549947 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature